GMAT备考，除了背背背，更重要的就是练练练！通过练习，巩固知识，熟练技巧，最终才能在GMAT考试中发挥出色，取得好成绩，所以练习的重要性不言而喻。因此，小编为大家精心准备了GMAT考试各类题型的练习题和答案解析，帮助大家每日一练，为考试做好准备。一起来看今天的题目吧。
今日练习题为数学题，题目如下
In the figure shown, line segment AD is parallel to line segment BC. What is the value of x?
(1)y=50
(2)z=40
A Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C BOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D EACH statement ALONE is sufficient.
E Statements (1) and (2) TOGETHER are NOT sufficient.
正确答案：
A
解题思路：
因为AD和BC平行，那么X和Y的角度就应该相同，所以条件1单独成立，条件2只知道Z的角度无法得出X的角度，所以条件2单独不成立。答案为A。
